Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte

A probe beam deflection (PBD) study of ion exchange between an electroactive polymer poly(allylamine)bipyridyl-pyridine osmium complex film and liquid electrolyte is reported. The PBD measurements were made simultaneously to chronoamperometric oxidation-reduction cycles, to be able to detect kinetic...

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Detalles Bibliográficos
Publicado: 2006
Materias:
Adsorption
Chemical bonds
Electric potential
Ion exchange
Multilayers
Polystyrenes
Self assembly
Electrostatic adsorption
Liquid electrolyte
Poly(styrene sulfonate) (PSS)
Probe beam deflection (PBD)
Polyelectrolytes
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v110_n31_p15345_Grumelli
http://hdl.handle.net/20.500.12110/paper_15206106_v110_n31_p15345_Grumelli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_15206106_v110_n31_p15345_Grumelli
record_format dspace
spelling paper:paper_15206106_v110_n31_p15345_Grumelli2023-06-08T16:18:55Z Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte Adsorption Chemical bonds Electric potential Ion exchange Multilayers Polystyrenes Self assembly Electrostatic adsorption Liquid electrolyte Poly(styrene sulfonate) (PSS) Probe beam deflection (PBD) Polyelectrolytes A probe beam deflection (PBD) study of ion exchange between an electroactive polymer poly(allylamine)bipyridyl-pyridine osmium complex film and liquid electrolyte is reported. The PBD measurements were made simultaneously to chronoamperometric oxidation-reduction cycles, to be able to detect kinetic effects in the ion exchange. Layer-by-layer (LbL) self-assembled redox polyelectrolyte films with osmium bipyridyl complex covalently attached to poly(allylamine) (PAH-Os) and poly(styrene sulfonate) (PSS) have been built by alternate electrostatic adsorption from soluble polyelectrolytes. The ionic exchange during initial conditioning of the film ("break-in") undergoing oxidation-reduction cycles and recovery after equilibration in the reduced state have shown an exchange of anions and cations with time lag between them. The effect of the nature of cation on the ionic exchange has been investigated with dilute HCl, LiCl, NaCl, and CsCl electrolytes. The ratio of anion to cation exchanged at the film-electrolyte interface has a strong dependence on the nature of charge in the topmost layer, that is, when negatively charged PSS is the capping layer, a larger proportion of cation exchange is observed. This demonstrates that the electrical potential distribution at the redox polyelectrolyte multilayer (PEM)/electrolyte interface determines the ionic flux in response to charge injection in the film. © 2006 American Chemical Society. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v110_n31_p15345_Grumelli http://hdl.handle.net/20.500.12110/paper_15206106_v110_n31_p15345_Grumelli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Adsorption
Chemical bonds
Electric potential
Ion exchange
Multilayers
Polystyrenes
Self assembly
Electrostatic adsorption
Liquid electrolyte
Poly(styrene sulfonate) (PSS)
Probe beam deflection (PBD)
Polyelectrolytes
spellingShingle Adsorption
Chemical bonds
Electric potential
Ion exchange
Multilayers
Polystyrenes
Self assembly
Electrostatic adsorption
Liquid electrolyte
Poly(styrene sulfonate) (PSS)
Probe beam deflection (PBD)
Polyelectrolytes
Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
topic_facet Adsorption
Chemical bonds
Electric potential
Ion exchange
Multilayers
Polystyrenes
Self assembly
Electrostatic adsorption
Liquid electrolyte
Poly(styrene sulfonate) (PSS)
Probe beam deflection (PBD)
Polyelectrolytes
description A probe beam deflection (PBD) study of ion exchange between an electroactive polymer poly(allylamine)bipyridyl-pyridine osmium complex film and liquid electrolyte is reported. The PBD measurements were made simultaneously to chronoamperometric oxidation-reduction cycles, to be able to detect kinetic effects in the ion exchange. Layer-by-layer (LbL) self-assembled redox polyelectrolyte films with osmium bipyridyl complex covalently attached to poly(allylamine) (PAH-Os) and poly(styrene sulfonate) (PSS) have been built by alternate electrostatic adsorption from soluble polyelectrolytes. The ionic exchange during initial conditioning of the film ("break-in") undergoing oxidation-reduction cycles and recovery after equilibration in the reduced state have shown an exchange of anions and cations with time lag between them. The effect of the nature of cation on the ionic exchange has been investigated with dilute HCl, LiCl, NaCl, and CsCl electrolytes. The ratio of anion to cation exchanged at the film-electrolyte interface has a strong dependence on the nature of charge in the topmost layer, that is, when negatively charged PSS is the capping layer, a larger proportion of cation exchange is observed. This demonstrates that the electrical potential distribution at the redox polyelectrolyte multilayer (PEM)/electrolyte interface determines the ionic flux in response to charge injection in the film. © 2006 American Chemical Society.
title Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
title_short Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
title_full Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
title_fullStr Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
title_full_unstemmed Dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
title_sort dynamics of ion exchange between self-assembled redox polyelectrolyte multilayer modified electrode and liquid electrolyte
publishDate 2006
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v110_n31_p15345_Grumelli
http://hdl.handle.net/20.500.12110/paper_15206106_v110_n31_p15345_Grumelli
_version_ 1768542613183397888

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